Picker-stick check.



F G. COBB.

PICKER STICK CHECK.

APPLICATION FILED APR.17. 1918.

Patented Sept. 3, 1918.

the picker-.Stick with. .each strokethereby so v '.,t'here is comes yentirely `upon .the band, so

bandwithout any .clamping action or with r AGannon 1 conn, or 'u nnnivvinnie, SOUTH CAROLINA.

piensa-STICK CHECK.

newness.

speqificatio of Letters Patent. Y Patented Sept. 3, 1918.

Appueancaieaaprn 17, 191s. u semi nazzaozei.

.To all whom #may concern.'

yBe itknown thatl, ,F Gronnoiv` Conja vCitizen ,Qt the kUnited States 0f .Amrita and e resident ,OfiGreehVlle Ceilhtyf 5 Greenville, ...State of, South Carolina, here ,invented .Certain new' and, usefullmprerements in Ji/cke 13StdckJ Checks, of which, the

, lfollowing isfa full( and clear specification.

This4 invention. has relatonjt that type of picker-stick checks in which an endless, l'e ;ible,leather ,orvotheiqband is arranged r`tovk eiicirclel,thel path Y of the picker-(stick and automatic means"isrprjovided,to cause ,the rband t0 intermittently .Greep olxroteteto thus. ,Present new Surfaces, to vthe .action of greatly prQlQneieer-the life `of ...thel l, halid- .QHeretofore,y this rotation `or creeping offthis iband has; been" Secured by intermittent ,grip devi/ces which, ,in practice, haveK been, found t0., S0011 .weer sufeehtly. ,tOQset vout of Order, and these devices have, therefore, notgvcolne into y contiinious-(use.

The object of my invention is to improvel thi-S type of Picker-,Stich.bygso Constructing yit that-*the use ofcams andsimilar jdevices u is entirely ereidett. thus rendering-the Adevice thoroughly4 practical, durable and very Y) easyA for .thelooni'attendant to carefor, the 1 construction being such that Lwhat little wear that, by renewing ythe bandat long intervals i thecheck` devices arelmaintained in efficient c onditionbas; more fullyk hereinafter set forth.

iIn vthe drawing- I loomstructure as ishnecessary to, illustrate y my; invention; Y

4Fig Zlisy a horiznntalvsectional view taken lonthevlineQ--Q of l; f Fig. 3 is a vertical sectional view on the line 3-3 pf Fig. 2... f

In the drawing, a designates the band, which issupported and guided in two guides.l

#Auand B, the picker-stick reciprocating as usual within the band and in a path parallel l to the guides. The guides are hung from lthe: lay vstruct u 1e in any suitable manner.

'Gruido B simplysupports and guides the comparatively little clamping action. `It

v consists ofrpplate' c, havingits lower edge ,lJturnedjoutwardly andrupwardly to form a. channel Z in which the, lvowerledge ofthe -,..behfl restsehd freely ISlides- Figure l is a side elevation of so much of a Y Guide Aconsists lof a vertical plate eL .Y whose ends g are turned outwardly to forin n a support for a .frictiomblock ,h which p res'sesfagainst the Aoutervkface of ythe! band and forces itagain'stfthe outer face of the 4 lguide plate e, thevnieaiis ,forl ,thus frictiona'llly y,fr )rcing the block la, againsttheband consisthis et ,a Hatsnline' remitted hi the' @idS of the arms4 gfand carrying a 4pressure pin 'bearing with a 'spring action against the outer I'face' ofthe block hl.- `2`l`he inner end v rounded head 7c which lbears against aleather insert] in the frictinllblock, and fo'r the purpose of decreasing or increasing Athei'ricas usual, shorter than the stroke `of v,the

`of the pin j isdesira-bly provided with a tion upon'the'bandat will, thefpin fis hreaded and providedwith a pair "of nuts picker-stick, theband will be bodilydrawny back andorth askthe picker-stick vibrates, y

Vth'efrictionaldrag (eXertedino'stly by the guide, which exerts a greater .f degree Vof y friction tlianlthe' guide .f B )y bein g sulicientto noiseless'lly. retard andn nchefckTtlieA stick. I .Dur-

Y ing the working' stroke of the ypieker-stick,

`the blowy is, asis well-known, sharpjand powerful, vso thatinA-inaking `this working strokehthe.: .band is moved .bodily the` full through both guides approximately Athe saine .ea ontghiswof'kte emettere is very l1ttle,.uif any,htenden cy to creep or rotate. i ,the reverse,nonfworking stroke, howeventhe movementlof thepicker-stick is, as iswelli'known, a slowerand less powerful .stroke/being in o're"in'ythehnature ofl a push thanna blow. ,By reason ef .this slower and less powerful movement oftlie1kpic'lre1fstick, the band willbe drawn ajfarther distance the freefguide Bthan outvof the fric- 4Ation guidefA, and this will result in a rotating or creeping action (oftheI brand toward ythe.frictiongguide, as shown bythe arrowy in Fig. k2.

l u The differential ,friction-drag, actionon thetwo sides of the band is essential,

therefore, in thisembodimentof the :invenvtion. Y

Ythe slightE differences inflthestrokes offdifen 4:ent pickersticks, but alsobecause of Certain .dittereneeeiethe Strength .0f .the bleue as length of 'lits stroke;I that is, kis drawn ,i

well as in the varying thicknesses, pliability at the laps of the bands, etc. To obtain this relative adjustability, I make at least one of the guides horizontally adjustable in any suitable manner, preferably by providing the 'plate c with a longitudinal slot o and passing the fastening belt p therethrough. I

preferably also make `the guide plate e shorter than the guide place c, in order to get the proper degree of drag at one s ide and the proper guiding and supporting function Vat theopposite side, the free guide B being relied upon more than the other guide for supporting the strap in its horlzontal position. It will be' understood that in callingthe guide B afree guide, I do not mean by this that the band is not subjected to any friction in passing'back vand forth in this guide, for, as a matter kof fact, I have found in practice that, in order to steady this side of the band and keep it from flopping and jumping about, it is desirable to provide a slight friction in this guide B.

The length of this `guide B alone will sufficiently create the necessary friction, butin addition to this, Ifind it desirableto extend the rounded head of the belt p into the channel l in position where the band will rub against it in sliding back and forth and thus slightly increasey the friction.

. It will be understood that my invention is not confined to the specic features of construction shown and described, sincey it is obviousthat many changes may be made in the manner of supporting-and guiding the band. Y

The nature and scope of the invention having been thus indicated and its 'preferred embodiment havingV been specifically ydescribed, what is claimed as new is:

1. In a picker check device, an endless check loop and two guides supporting the same at ,opposite sides of the path of movement of the picker-stick, means being provided whereby one of these guides'exerts constantly a greaterslip-permitting friction drag on the band than the' other, whereby the mere vibration of the picker-stick will cause the band to creep or rotate.

2. In a picker check device, an endless check loop and two guides supporting the j same at opposite sides of the path of move- 1 ment of the picker-stick, means being provided wherebyy one of these 'guides exerts constantly a greater slip-permitting friction drag on the band than the other, whereby the mere vibration of the picker-stick will cause the band to creep or rotate, means being provided also whereby one of the guides is rendered horizontally adjustable endwise.

3. In a picker check device, an endless check loop and two guides supporting the Isame at opposite sides of the pathV of move- Jaient of the picker-stick, means being provided whereby one of these guides exerts the mere vibration of the picker-stick will cause the band to creep or rotate, means being provided also for endwisely adjusting the guide exerting the less friction drag.

l. In a picker check device, an endless check loop and two guides supporting the same at opposite sides of the path of movement of the picker-stick, means being provided whereby one of these guides exerts constantly a greater slip-permitting friction drag on the band than the other, whereby the mere vibration of the picker-stick will cause the band to creep or rotate, the guide exerting the less friction being longer than thev other guide, and means being provided whereby this longer guide is rendered endwisely adjustable.

5.1111 Va loom in which the picker-stick is vibrated more powerfully on one stroke than for causing the check-strap to rotate or creepfunder Vthe direct blows of the picker stick.

6. In a loom in which the picker-stick is vibrated more powerfully on its working stroke vrthan on the return stroke, the combination of a check-strap encircling the picker-stick and having a diameter less than the stroke of the picker-stick, and means for supporting and guiding the check-strap at each side of the path of movement of the picker-stick, the supporting and guidmg means at one side constantly Vexerting a greater degree of slip-permitting frictiondrag on the strap than the supporting and guiding means at the other side, whereby the strap will have imparted to it on the working stroke of the picker-stick a body movement while on its non-working stroke the l side of the strap that has the greater degree of friction-drag will beheld substantially against movement while the other side of the strap will be freely drawn out of the supporting and guiding means to thereby Vcause the strap to intermittently rotate.

picker-stick but permitting a movement of the strap therethrough upon the Working stroke of the picker-stick, whereby the strap Will be given a stepeby-step movement.

8. In a loom in which the picker-stick is vibrated more powerfully on its Working stroke than on the return stroke, the oombination of a cheek-strap encircling the picker-stick and having a. diameter less than the stroke of the picker-stick, and means for guiding the cheek-strap at each side of the path of movement of the pioker-stiek, y

and for exerting constantly a slip-permitting friction-drag on the strap, the dragprodueing means at one side being eonstruet ed to permit a dierent degree of rotative movement on the Working and non-Working strokes of the picker-stick. Y

In testimony whereof l. hereunto aiix m signature. Y

F GORDON COBB( Copies of this patent may be obtained for ylive cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

